void CBlock_ScaleSpectralData(CAacDecoderChannelInfo *pAacDecoderChannelInfo, SamplingRateInfo *pSamplingRateInfo)
{
int band;
int window;
const SHORT * RESTRICT pSfbScale = pAacDecoderChannelInfo->pDynData->aSfbScale;
SHORT * RESTRICT pSpecScale = pAacDecoderChannelInfo->specScale;
int groupwin,group;
const SHORT * RESTRICT BandOffsets = GetScaleFactorBandOffsets(&pAacDecoderChannelInfo->icsInfo, pSamplingRateInfo);
SPECTRAL_PTR RESTRICT pSpectralCoefficient = pAacDecoderChannelInfo->pSpectralCoefficient;
FDKmemclear(pSpecScale, 8*sizeof(SHORT));
int max_band = GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo->icsInfo);
for (window=0, group=0; group < GetWindowGroups(&pAacDecoderChannelInfo->icsInfo); group++)
{
for (groupwin=0; groupwin < GetWindowGroupLength(&pAacDecoderChannelInfo->icsInfo,group); groupwin++, window++)
{
int SpecScale_window = pSpecScale[window];
FIXP_DBL *pSpectrum = SPEC(pSpectralCoefficient, window, pAacDecoderChannelInfo->granuleLength);
/* find scaling for current window */
for (band=0; band < max_band; band++)
{
SpecScale_window = fMax(SpecScale_window, (int)pSfbScale[window*16+band]);
}
if (pAacDecoderChannelInfo->pDynData->TnsData.Active) {
SpecScale_window += TNS_SCALE;
}
/* store scaling of current window */
pSpecScale[window] = SpecScale_window;
#ifdef FUNCTION_CBlock_ScaleSpectralData_func1
CBlock_ScaleSpectralData_func1(pSpectrum, max_band, BandOffsets, SpecScale_window, pSfbScale, window);
#else /* FUNCTION_CBlock_ScaleSpectralData_func1 */
for (band=0; band < max_band; band++)
{
int scale = SpecScale_window - pSfbScale[window*16+band];
if (scale)
{
/* following relation can be used for optimizations: (BandOffsets[i]%4) == 0 for all i */
int max_index = BandOffsets[band+1];
for (int index = BandOffsets[band]; index < max_index; index++)
{
pSpectrum[index] >>= scale;
}
}
}
#endif /* FUNCTION_CBlock_ScaleSpectralData_func1 */
}
}
}
AAC_DECODER_ERROR CBlock_ReadScaleFactorData(
CAacDecoderChannelInfo *pAacDecoderChannelInfo,
HANDLE_FDK_BITSTREAM bs,
UINT flags
)
{
int temp;
int band;
int group;
int position = 0; /* accu for intensity delta coding */
int factor = pAacDecoderChannelInfo->pDynData->RawDataInfo.GlobalGain; /* accu for scale factor delta coding */
UCHAR *pCodeBook = pAacDecoderChannelInfo->pDynData->aCodeBook;
SHORT *pScaleFactor = pAacDecoderChannelInfo->pDynData->aScaleFactor;
const CodeBookDescription *hcb =&AACcodeBookDescriptionTable[BOOKSCL];
int ScaleFactorBandsTransmitted = GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo->icsInfo);
for (group=0; group < GetWindowGroups(&pAacDecoderChannelInfo->icsInfo); group++)
{
for (band=0; band < ScaleFactorBandsTransmitted; band++)
{
switch (pCodeBook[group*16+band]) {
case ZERO_HCB: /* zero book */
pScaleFactor[group*16+band] = 0;
break;
default: /* decode scale factor */
{
temp = CBlock_DecodeHuffmanWord(bs,hcb);
factor += temp - 60; /* MIDFAC 1.5 dB */
}
pScaleFactor[group*16+band] = factor - 100;
break;
case INTENSITY_HCB: /* intensity steering */
case INTENSITY_HCB2:
temp = CBlock_DecodeHuffmanWord(bs,hcb);
position += temp - 60;
pScaleFactor[group*16+band] = position - 100;
break;
case NOISE_HCB: /* PNS */
if (flags & (AC_MPS_RES|AC_USAC|AC_RSVD50)) {
return AAC_DEC_PARSE_ERROR;
}
CPns_Read( &pAacDecoderChannelInfo->data.aac.PnsData, bs, hcb, pAacDecoderChannelInfo->pDynData->aScaleFactor, pAacDecoderChannelInfo->pDynData->RawDataInfo.GlobalGain, band, group);
break;
}
}
}
return AAC_DEC_OK;
}
INT CPulseData_Read(
HANDLE_FDK_BITSTREAM bs,
CPulseData *const PulseData,
const SHORT *sfb_startlines,
const void *pIcsInfo,
const SHORT frame_length
)
{
int i, k=0;
const UINT MaxSfBands = GetScaleFactorBandsTransmitted((CIcsInfo*)pIcsInfo);
/* reset pulse data flag */
PulseData->PulseDataPresent = 0;
if ((PulseData->PulseDataPresent = (UCHAR) FDKreadBit(bs)) != 0) {
if (!IsLongBlock((CIcsInfo*)pIcsInfo)) {
return AAC_DEC_DECODE_FRAME_ERROR;
}
PulseData->NumberPulse = (UCHAR) FDKreadBits(bs,2);
PulseData->PulseStartBand = (UCHAR) FDKreadBits(bs,6);
if (PulseData->PulseStartBand >= MaxSfBands) {
return AAC_DEC_DECODE_FRAME_ERROR;
}
k = sfb_startlines[PulseData->PulseStartBand];
for (i=0; i<=PulseData->NumberPulse; i++) {
PulseData->PulseOffset[i] = (UCHAR) FDKreadBits(bs,5);
PulseData->PulseAmp[i] = (UCHAR) FDKreadBits(bs,4);
k += PulseData->PulseOffset[i];
}
if (k >= frame_length) {
return AAC_DEC_DECODE_FRAME_ERROR;
}
}
return 0;
}
void CChannel_CodebookTableInit(CAacDecoderChannelInfo *pAacDecoderChannelInfo)
{
int b, w, maxBands, maxWindows;
int maxSfb = GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo->icsInfo);
UCHAR *pCodeBook = pAacDecoderChannelInfo->pDynData->aCodeBook;
if ( IsLongBlock(&pAacDecoderChannelInfo->icsInfo) ) {
maxBands = 64;
maxWindows = 1;
} else {
maxBands = 16;
maxWindows = 8;
}
for (w = 0; w<maxWindows; w++) {
for (b = 0; b < maxSfb; b++) {
pCodeBook[b] = ESCBOOK;
}
for (; b<maxBands; b++) {
pCodeBook[b] = ZERO_HCB;
}
pCodeBook += maxBands;
}
}
/*!
\brief Decode channel pair element
The function decodes a channel pair element.
\return none
*/
void CChannelElement_Decode( CAacDecoderChannelInfo *pAacDecoderChannelInfo[2], /*!< pointer to aac decoder channel info */
CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo[2],
SamplingRateInfo *pSamplingRateInfo,
UINT flags,
int el_channels)
{
int ch, maybe_jstereo = 0;
maybe_jstereo = (el_channels > 1);
for (ch = 0; ch < el_channels; ch++) {
if ( pAacDecoderChannelInfo[ch]->renderMode == AACDEC_RENDER_IMDCT
|| pAacDecoderChannelInfo[ch]->renderMode == AACDEC_RENDER_ELDFB )
{
CBlock_InverseQuantizeSpectralData(pAacDecoderChannelInfo[ch], pSamplingRateInfo);
}
}
if (maybe_jstereo) {
/* apply ms */
if (pAacDecoderChannelInfo[L]->pDynData->RawDataInfo.CommonWindow) {
int maxSfBandsL = GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo[L]->icsInfo);
int maxSfBandsR = GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo[R]->icsInfo);
if (pAacDecoderChannelInfo[L]->data.aac.PnsData.PnsActive || pAacDecoderChannelInfo[R]->data.aac.PnsData.PnsActive) {
MapMidSideMaskToPnsCorrelation(pAacDecoderChannelInfo);
}
CJointStereo_ApplyMS(pAacDecoderChannelInfo,
GetScaleFactorBandOffsets(&pAacDecoderChannelInfo[L]->icsInfo, pSamplingRateInfo),
GetWindowGroupLengthTable(&pAacDecoderChannelInfo[L]->icsInfo),
GetWindowGroups(&pAacDecoderChannelInfo[L]->icsInfo),
maxSfBandsL,
maxSfBandsR);
}
/* apply intensity stereo */ /* modifies pAacDecoderChannelInfo[]->aSpecSfb */
CJointStereo_ApplyIS(pAacDecoderChannelInfo,
GetScaleFactorBandOffsets(&pAacDecoderChannelInfo[L]->icsInfo, pSamplingRateInfo),
GetWindowGroupLengthTable(&pAacDecoderChannelInfo[L]->icsInfo),
GetWindowGroups(&pAacDecoderChannelInfo[L]->icsInfo),
GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo[L]->icsInfo),
pAacDecoderChannelInfo[L]->pDynData->RawDataInfo.CommonWindow ? 1 : 0);
}
for (ch = 0; ch < el_channels; ch++)
{
{
/* write pAacDecoderChannelInfo[ch]->specScale */
CBlock_ScaleSpectralData(pAacDecoderChannelInfo[ch], pSamplingRateInfo);
ApplyTools (pAacDecoderChannelInfo, pSamplingRateInfo, flags, ch);
}
}
CRvlc_ElementCheck(
pAacDecoderChannelInfo,
pAacDecoderStaticChannelInfo,
flags,
el_channels
);
}
AAC_DECODER_ERROR CBlock_ReadSectionData(HANDLE_FDK_BITSTREAM bs,
CAacDecoderChannelInfo *pAacDecoderChannelInfo,
const SamplingRateInfo *pSamplingRateInfo,
const UINT flags)
{
int top, band;
int sect_len, sect_len_incr;
int group;
UCHAR sect_cb;
UCHAR *pCodeBook = pAacDecoderChannelInfo->pDynData->aCodeBook;
/* HCR input (long) */
SHORT *pNumLinesInSec = pAacDecoderChannelInfo->pDynData->specificTo.aac.aNumLineInSec4Hcr;
int numLinesInSecIdx = 0;
UCHAR *pHcrCodeBook = pAacDecoderChannelInfo->pDynData->specificTo.aac.aCodeBooks4Hcr;
const SHORT *BandOffsets = GetScaleFactorBandOffsets(&pAacDecoderChannelInfo->icsInfo, pSamplingRateInfo);
pAacDecoderChannelInfo->pDynData->specificTo.aac.numberSection = 0;
AAC_DECODER_ERROR ErrorStatus = AAC_DEC_OK;
FDKmemclear(pCodeBook, sizeof(UCHAR)*(8*16));
const int nbits = (IsLongBlock(&pAacDecoderChannelInfo->icsInfo) == 1) ? 5 : 3;
int sect_esc_val = (1 << nbits) - 1 ;
UCHAR ScaleFactorBandsTransmitted = GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo->icsInfo);
for (group=0; group<GetWindowGroups(&pAacDecoderChannelInfo->icsInfo); group++)
{
for (band=0; band < ScaleFactorBandsTransmitted; )
{
sect_len = 0;
if ( flags & AC_ER_VCB11 ) {
sect_cb = (UCHAR) FDKreadBits(bs,5);
}
else
sect_cb = (UCHAR) FDKreadBits(bs,4);
if ( ((flags & AC_ER_VCB11) == 0) || ( sect_cb < 11 ) || ((sect_cb > 11) && (sect_cb < 16)) ) {
sect_len_incr = FDKreadBits(bs, nbits);
while (sect_len_incr == sect_esc_val)
{
sect_len += sect_esc_val;
sect_len_incr = FDKreadBits(bs, nbits);
}
}
else {
sect_len_incr = 1;
}
sect_len += sect_len_incr;
top = band + sect_len;
if (flags & AC_ER_HCR) {
/* HCR input (long) -- collecting sideinfo (for HCR-_long_ only) */
if (numLinesInSecIdx >= MAX_SFB_HCR) {
return AAC_DEC_PARSE_ERROR;
}
pNumLinesInSec[numLinesInSecIdx] = BandOffsets[top] - BandOffsets[band];
numLinesInSecIdx++;
if (sect_cb == BOOKSCL)
{
return AAC_DEC_INVALID_CODE_BOOK;
} else {
*pHcrCodeBook++ = sect_cb;
}
pAacDecoderChannelInfo->pDynData->specificTo.aac.numberSection++;
}
/* Check spectral line limits */
if (IsLongBlock( &(pAacDecoderChannelInfo->icsInfo) ))
{
if (top > 64) {
return AAC_DEC_DECODE_FRAME_ERROR;
}
} else { /* short block */
if (top + group*16 > (8 * 16)) {
return AAC_DEC_DECODE_FRAME_ERROR;
}
}
/* Check if decoded codebook index is feasible */
if ( (sect_cb == BOOKSCL)
|| ( (sect_cb == INTENSITY_HCB || sect_cb == INTENSITY_HCB2) && pAacDecoderChannelInfo->pDynData->RawDataInfo.CommonWindow == 0)
)
{
return AAC_DEC_INVALID_CODE_BOOK;
}
/* Store codebook index */
for (; band < top; band++)
{
pCodeBook[group*16+band] = sect_cb;
}
}
}
return ErrorStatus;
}
/*
* Arbitrary order bitstream parser
*/
AAC_DECODER_ERROR CChannelElement_Read(
HANDLE_FDK_BITSTREAM hBs, CAacDecoderChannelInfo *pAacDecoderChannelInfo[],
CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo[],
const AUDIO_OBJECT_TYPE aot, SamplingRateInfo *pSamplingRateInfo,
const UINT flags, const UINT elFlags, const UINT frame_length,
const UCHAR numberOfChannels, const SCHAR epConfig,
HANDLE_TRANSPORTDEC pTpDec) {
AAC_DECODER_ERROR error = AAC_DEC_OK;
const element_list_t *list;
int i, ch, decision_bit;
int crcReg1 = -1, crcReg2 = -1;
int cplxPred;
int ind_sw_cce_flag = 0, num_gain_element_lists = 0;
FDK_ASSERT((numberOfChannels == 1) || (numberOfChannels == 2));
/* Get channel element sequence table */
list = getBitstreamElementList(aot, epConfig, numberOfChannels, 0, elFlags);
if (list == NULL) {
error = AAC_DEC_UNSUPPORTED_FORMAT;
goto bail;
}
CTns_Reset(&pAacDecoderChannelInfo[0]->pDynData->TnsData);
/* Set common window to 0 by default. If signalized in the bit stream it will
* be overwritten later explicitely */
pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow = 0;
if (flags & (AC_USAC | AC_RSVD50 | AC_RSV603DA)) {
pAacDecoderChannelInfo[0]->pDynData->specificTo.usac.tns_active = 0;
pAacDecoderChannelInfo[0]->pDynData->specificTo.usac.tns_on_lr = 0;
}
if (numberOfChannels == 2) {
CTns_Reset(&pAacDecoderChannelInfo[1]->pDynData->TnsData);
pAacDecoderChannelInfo[1]->pDynData->RawDataInfo.CommonWindow = 0;
}
cplxPred = 0;
if (pAacDecoderStaticChannelInfo != NULL) {
if (elFlags & AC_EL_USAC_CP_POSSIBLE) {
pAacDecoderChannelInfo[0]->pComData->jointStereoData.cplx_pred_flag = 0;
cplxPred = 1;
}
}
if (0 || (flags & (AC_ELD | AC_SCALABLE))) {
pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow = 1;
if (numberOfChannels == 2) {
pAacDecoderChannelInfo[1]->pDynData->RawDataInfo.CommonWindow =
pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow;
}
}
/* Iterate through sequence table */
i = 0;
ch = 0;
decision_bit = 0;
do {
switch (list->id[i]) {
case element_instance_tag:
pAacDecoderChannelInfo[0]->ElementInstanceTag = FDKreadBits(hBs, 4);
if (numberOfChannels == 2) {
pAacDecoderChannelInfo[1]->ElementInstanceTag =
pAacDecoderChannelInfo[0]->ElementInstanceTag;
}
break;
case common_window:
decision_bit =
pAacDecoderChannelInfo[ch]->pDynData->RawDataInfo.CommonWindow =
FDKreadBits(hBs, 1);
if (numberOfChannels == 2) {
pAacDecoderChannelInfo[1]->pDynData->RawDataInfo.CommonWindow =
pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow;
}
break;
case ics_info:
/* store last window sequence (utilized in complex stereo prediction)
* before reading new channel-info */
if (cplxPred) {
if (pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow) {
pAacDecoderStaticChannelInfo[0]
->pCpeStaticData->jointStereoPersistentData.winSeqPrev =
pAacDecoderChannelInfo[0]->icsInfo.WindowSequence;
pAacDecoderStaticChannelInfo[0]
->pCpeStaticData->jointStereoPersistentData.winShapePrev =
pAacDecoderChannelInfo[0]->icsInfo.WindowShape;
}
}
/* Read individual channel info */
error = IcsRead(hBs, &pAacDecoderChannelInfo[ch]->icsInfo,
pSamplingRateInfo, flags);
if (elFlags & AC_EL_LFE &&
GetWindowSequence(&pAacDecoderChannelInfo[ch]->icsInfo) !=
BLOCK_LONG) {
error = AAC_DEC_PARSE_ERROR;
break;
}
if (numberOfChannels == 2 &&
pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow) {
pAacDecoderChannelInfo[1]->icsInfo =
pAacDecoderChannelInfo[0]->icsInfo;
}
break;
case common_max_sfb:
if (FDKreadBit(hBs) == 0) {
error = IcsReadMaxSfb(hBs, &pAacDecoderChannelInfo[1]->icsInfo,
pSamplingRateInfo);
}
break;
case ltp_data_present:
if (FDKreadBits(hBs, 1) != 0) {
error = AAC_DEC_UNSUPPORTED_PREDICTION;
}
break;
case ms:
INT max_sfb_ste;
INT max_sfb_ste_clear;
max_sfb_ste = GetScaleMaxFactorBandsTransmitted(
&pAacDecoderChannelInfo[0]->icsInfo,
&pAacDecoderChannelInfo[1]->icsInfo);
max_sfb_ste_clear = 64;
pAacDecoderChannelInfo[0]->icsInfo.max_sfb_ste = (UCHAR)max_sfb_ste;
pAacDecoderChannelInfo[1]->icsInfo.max_sfb_ste = (UCHAR)max_sfb_ste;
if (flags & (AC_USAC | AC_RSV603DA) &&
pAacDecoderChannelInfo[ch]->pDynData->RawDataInfo.CommonWindow ==
0) {
Clean_Complex_Prediction_coefficients(
&pAacDecoderStaticChannelInfo[0]
->pCpeStaticData->jointStereoPersistentData,
GetWindowGroups(&pAacDecoderChannelInfo[0]->icsInfo), 0, 64);
}
if (CJointStereo_Read(
hBs, &pAacDecoderChannelInfo[0]->pComData->jointStereoData,
GetWindowGroups(&pAacDecoderChannelInfo[0]->icsInfo),
max_sfb_ste, max_sfb_ste_clear,
/* jointStereoPersistentData and cplxPredictionData are only
available/allocated if cplxPred is active. */
((cplxPred == 0) || (pAacDecoderStaticChannelInfo == NULL))
? NULL
: &pAacDecoderStaticChannelInfo[0]
->pCpeStaticData->jointStereoPersistentData,
((cplxPred == 0) || (pAacDecoderChannelInfo[0] == NULL))
? NULL
: pAacDecoderChannelInfo[0]
->pComStaticData->cplxPredictionData,
cplxPred,
GetScaleFactorBandsTotal(&pAacDecoderChannelInfo[0]->icsInfo),
GetWindowSequence(&pAacDecoderChannelInfo[0]->icsInfo),
flags)) {
error = AAC_DEC_PARSE_ERROR;
}
break;
case global_gain:
pAacDecoderChannelInfo[ch]->pDynData->RawDataInfo.GlobalGain =
(UCHAR)FDKreadBits(hBs, 8);
break;
case section_data:
error = CBlock_ReadSectionData(hBs, pAacDecoderChannelInfo[ch],
pSamplingRateInfo, flags);
break;
case scale_factor_data_usac:
pAacDecoderChannelInfo[ch]->currAliasingSymmetry = 0;
/* Set active sfb codebook indexes to HCB_ESC to make them "active" */
CChannel_CodebookTableInit(
pAacDecoderChannelInfo[ch]); /* equals ReadSectionData(self,
bs) in float soft. block.c
line: ~599 */
/* Note: The missing "break" is intentional here, since we need to call
* CBlock_ReadScaleFactorData(). */
case scale_factor_data:
if (flags & AC_ER_RVLC) {
/* read RVLC data from bitstream (error sens. cat. 1) */
CRvlc_Read(pAacDecoderChannelInfo[ch], hBs);
} else {
error = CBlock_ReadScaleFactorData(pAacDecoderChannelInfo[ch], hBs,
flags);
}
break;
case pulse:
if (CPulseData_Read(
hBs,
&pAacDecoderChannelInfo[ch]->pDynData->specificTo.aac.PulseData,
pSamplingRateInfo->ScaleFactorBands_Long, /* pulse data is only
allowed to be
present in long
blocks! */
(void *)&pAacDecoderChannelInfo[ch]->icsInfo,
frame_length) != 0) {
error = AAC_DEC_DECODE_FRAME_ERROR;
}
break;
case tns_data_present:
CTns_ReadDataPresentFlag(
hBs, &pAacDecoderChannelInfo[ch]->pDynData->TnsData);
if (elFlags & AC_EL_LFE &&
pAacDecoderChannelInfo[ch]->pDynData->TnsData.DataPresent) {
error = AAC_DEC_PARSE_ERROR;
}
break;
case tns_data:
/* tns_data_present is checked inside CTns_Read(). */
error = CTns_Read(hBs, &pAacDecoderChannelInfo[ch]->pDynData->TnsData,
&pAacDecoderChannelInfo[ch]->icsInfo, flags);
break;
case gain_control_data:
break;
case gain_control_data_present:
if (FDKreadBits(hBs, 1)) {
error = AAC_DEC_UNSUPPORTED_GAIN_CONTROL_DATA;
}
break;
case tw_data:
break;
case common_tw:
break;
case tns_data_present_usac:
if (pAacDecoderChannelInfo[0]->pDynData->specificTo.usac.tns_active) {
CTns_ReadDataPresentUsac(
hBs, &pAacDecoderChannelInfo[0]->pDynData->TnsData,
&pAacDecoderChannelInfo[1]->pDynData->TnsData,
&pAacDecoderChannelInfo[0]->pDynData->specificTo.usac.tns_on_lr,
&pAacDecoderChannelInfo[0]->icsInfo, flags, elFlags,
pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow);
} else {
pAacDecoderChannelInfo[0]->pDynData->specificTo.usac.tns_on_lr =
(UCHAR)1;
}
break;
case core_mode:
decision_bit = FDKreadBits(hBs, 1);
pAacDecoderChannelInfo[ch]->data.usac.core_mode = decision_bit;
if ((ch == 1) && (pAacDecoderChannelInfo[0]->data.usac.core_mode !=
pAacDecoderChannelInfo[1]->data.usac.core_mode)) {
/* StereoCoreToolInfo(core_mode[ch] ) */
pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow = 0;
pAacDecoderChannelInfo[1]->pDynData->RawDataInfo.CommonWindow = 0;
}
break;
case tns_active:
pAacDecoderChannelInfo[0]->pDynData->specificTo.usac.tns_active =
FDKreadBit(hBs);
break;
case noise:
if (elFlags & AC_EL_USAC_NOISE) {
pAacDecoderChannelInfo[ch]
->pDynData->specificTo.usac.fd_noise_level_and_offset =
FDKreadBits(hBs, 3 + 5); /* Noise level */
}
break;
case lpd_channel_stream:
{
error = CLpdChannelStream_Read(/* = lpd_channel_stream() */
hBs, pAacDecoderChannelInfo[ch],
pAacDecoderStaticChannelInfo[ch],
pSamplingRateInfo, flags);
}
pAacDecoderChannelInfo[ch]->renderMode = AACDEC_RENDER_LPD;
break;
case fac_data: {
int fFacDatPresent = FDKreadBit(hBs);
/* Wee need a valid fac_data[0] even if no FAC data is present (as
* temporal buffer) */
pAacDecoderChannelInfo[ch]->data.usac.fac_data[0] =
pAacDecoderChannelInfo[ch]->data.usac.fac_data0;
if (fFacDatPresent) {
if (elFlags & AC_EL_LFE) {
error = AAC_DEC_PARSE_ERROR;
break;
}
/* FAC data present, this frame is FD, so the last mode had to be
* ACELP. */
if (pAacDecoderStaticChannelInfo[ch]->last_core_mode != LPD ||
pAacDecoderStaticChannelInfo[ch]->last_lpd_mode != 0) {
pAacDecoderChannelInfo[ch]->data.usac.core_mode_last = LPD;
pAacDecoderChannelInfo[ch]->data.usac.lpd_mode_last = 0;
/* We can't change the past! So look to the future and go ahead! */
}
CLpd_FAC_Read(hBs, pAacDecoderChannelInfo[ch]->data.usac.fac_data[0],
pAacDecoderChannelInfo[ch]->data.usac.fac_data_e,
CLpd_FAC_getLength(
IsLongBlock(&pAacDecoderChannelInfo[ch]->icsInfo),
pAacDecoderChannelInfo[ch]->granuleLength),
1, 0);
} else {
if (pAacDecoderStaticChannelInfo[ch]->last_core_mode == LPD &&
pAacDecoderStaticChannelInfo[ch]->last_lpd_mode == 0) {
/* ACELP to FD transitons without FAC are possible. That is why we
zero it out (i.e FAC will not be considered in the subsequent
calculations */
FDKmemclear(pAacDecoderChannelInfo[ch]->data.usac.fac_data0,
LFAC * sizeof(FIXP_DBL));
}
}
} break;
case esc2_rvlc:
if (flags & AC_ER_RVLC) {
CRvlc_Decode(pAacDecoderChannelInfo[ch],
pAacDecoderStaticChannelInfo[ch], hBs);
}
break;
case esc1_hcr:
if (flags & AC_ER_HCR) {
CHcr_Read(hBs, pAacDecoderChannelInfo[ch],
numberOfChannels == 2 ? ID_CPE : ID_SCE);
}
break;
case spectral_data:
error = CBlock_ReadSpectralData(hBs, pAacDecoderChannelInfo[ch],
pSamplingRateInfo, flags);
if (flags & AC_ELD) {
pAacDecoderChannelInfo[ch]->renderMode = AACDEC_RENDER_ELDFB;
} else {
if (flags & AC_HDAAC) {
pAacDecoderChannelInfo[ch]->renderMode = AACDEC_RENDER_INTIMDCT;
} else {
pAacDecoderChannelInfo[ch]->renderMode = AACDEC_RENDER_IMDCT;
}
}
break;
case ac_spectral_data:
error = CBlock_ReadAcSpectralData(
hBs, pAacDecoderChannelInfo[ch], pAacDecoderStaticChannelInfo[ch],
pSamplingRateInfo, frame_length, flags);
pAacDecoderChannelInfo[ch]->renderMode = AACDEC_RENDER_IMDCT;
break;
case coupled_elements: {
int num_coupled_elements, c;
ind_sw_cce_flag = FDKreadBit(hBs);
num_coupled_elements = FDKreadBits(hBs, 3);
for (c = 0; c < (num_coupled_elements + 1); c++) {
int cc_target_is_cpe;
num_gain_element_lists++;
cc_target_is_cpe = FDKreadBit(hBs); /* cc_target_is_cpe[c] */
FDKreadBits(hBs, 4); /* cc_target_tag_select[c] */
if (cc_target_is_cpe) {
int cc_l, cc_r;
cc_l = FDKreadBit(hBs); /* cc_l[c] */
cc_r = FDKreadBit(hBs); /* cc_r[c] */
if (cc_l && cc_r) {
num_gain_element_lists++;
}
}
}
FDKreadBit(hBs); /* cc_domain */
FDKreadBit(hBs); /* gain_element_sign */
FDKreadBits(hBs, 2); /* gain_element_scale */
} break;
case gain_element_lists: {
const CodeBookDescription *hcb;
UCHAR *pCodeBook;
int c;
hcb = &AACcodeBookDescriptionTable[BOOKSCL];
pCodeBook = pAacDecoderChannelInfo[ch]->pDynData->aCodeBook;
for (c = 1; c < num_gain_element_lists; c++) {
int cge;
if (ind_sw_cce_flag) {
cge = 1;
} else {
cge = FDKreadBits(hBs, 1); /* common_gain_element_present[c] */
}
if (cge) {
/* Huffman */
CBlock_DecodeHuffmanWord(
hBs, hcb); /* hcod_sf[common_gain_element[c]] 1..19 */
} else {
int g, sfb;
for (g = 0;
g < GetWindowGroups(&pAacDecoderChannelInfo[ch]->icsInfo);
g++) {
for (sfb = 0; sfb < GetScaleFactorBandsTransmitted(
&pAacDecoderChannelInfo[ch]->icsInfo);
sfb++) {
if (pCodeBook[sfb] != ZERO_HCB) {
/* Huffman */
CBlock_DecodeHuffmanWord(
hBs,
hcb); /* hcod_sf[dpcm_gain_element[c][g][sfb]] 1..19 */
}
}
}
}
}
} break;
/* CRC handling */
case adtscrc_start_reg1:
if (pTpDec != NULL) {
crcReg1 = transportDec_CrcStartReg(pTpDec, 192);
}
break;
case adtscrc_start_reg2:
if (pTpDec != NULL) {
crcReg2 = transportDec_CrcStartReg(pTpDec, 128);
}
break;
case adtscrc_end_reg1:
case drmcrc_end_reg:
if (pTpDec != NULL) {
transportDec_CrcEndReg(pTpDec, crcReg1);
crcReg1 = -1;
}
break;
case adtscrc_end_reg2:
if (crcReg1 != -1) {
error = AAC_DEC_DECODE_FRAME_ERROR;
} else if (pTpDec != NULL) {
transportDec_CrcEndReg(pTpDec, crcReg2);
crcReg2 = -1;
}
break;
case drmcrc_start_reg:
if (pTpDec != NULL) {
crcReg1 = transportDec_CrcStartReg(pTpDec, 0);
}
break;
/* Non data cases */
case next_channel:
ch = (ch + 1) % numberOfChannels;
break;
case link_sequence:
list = list->next[decision_bit];
i = -1;
break;
default:
error = AAC_DEC_UNSUPPORTED_FORMAT;
break;
}
if (error != AAC_DEC_OK) {
goto bail;
}
i++;
} while (list->id[i] != end_of_sequence);
for (ch = 0; ch < numberOfChannels; ch++) {
if (pAacDecoderChannelInfo[ch]->renderMode == AACDEC_RENDER_IMDCT ||
pAacDecoderChannelInfo[ch]->renderMode == AACDEC_RENDER_ELDFB) {
/* Shows which bands are empty. */
UCHAR *band_is_noise =
pAacDecoderChannelInfo[ch]->pDynData->band_is_noise;
FDKmemset(band_is_noise, (UCHAR)1, sizeof(UCHAR) * (8 * 16));
error = CBlock_InverseQuantizeSpectralData(
pAacDecoderChannelInfo[ch], pSamplingRateInfo, band_is_noise, 1);
if (error != AAC_DEC_OK) {
return error;
}
if (elFlags & AC_EL_USAC_NOISE) {
CBlock_ApplyNoise(pAacDecoderChannelInfo[ch], pSamplingRateInfo,
&pAacDecoderStaticChannelInfo[ch]->nfRandomSeed,
band_is_noise);
} /* if (elFlags & AC_EL_USAC_NOISE) */
}
}
bail:
if (crcReg1 != -1 || crcReg2 != -1) {
if (error == AAC_DEC_OK) {
error = AAC_DEC_DECODE_FRAME_ERROR;
}
if (crcReg1 != -1) {
transportDec_CrcEndReg(pTpDec, crcReg1);
}
if (crcReg2 != -1) {
transportDec_CrcEndReg(pTpDec, crcReg2);
}
}
return error;
}
/*!
\brief Decode channel pair element
The function decodes a channel pair element.
\return none
*/
void CChannelElement_Decode(
CAacDecoderChannelInfo
*pAacDecoderChannelInfo[2], /*!< pointer to aac decoder channel info */
CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo[2],
SamplingRateInfo *pSamplingRateInfo, UINT flags, UINT elFlags,
int el_channels) {
int ch = 0;
int maxSfBandsL = 0, maxSfBandsR = 0;
int maybe_jstereo = (el_channels > 1);
if (flags & (AC_USAC | AC_RSVD50 | AC_RSV603DA) && el_channels == 2) {
if (pAacDecoderChannelInfo[L]->data.usac.core_mode ||
pAacDecoderChannelInfo[R]->data.usac.core_mode) {
maybe_jstereo = 0;
}
}
if (maybe_jstereo) {
maxSfBandsL =
GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo[L]->icsInfo);
maxSfBandsR =
GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo[R]->icsInfo);
/* apply ms */
if (pAacDecoderChannelInfo[L]->pDynData->RawDataInfo.CommonWindow) {
if (!(flags & (AC_USAC | AC_RSVD50 | AC_RSV603DA))) {
if (pAacDecoderChannelInfo[L]->data.aac.PnsData.PnsActive ||
pAacDecoderChannelInfo[R]->data.aac.PnsData.PnsActive) {
MapMidSideMaskToPnsCorrelation(pAacDecoderChannelInfo);
}
}
/* if tns_on_lr == 1 run MS */ /* &&
(pAacDecoderChannelInfo[L]->pDynData->specificTo.usac.tns_active
== 1) */
if (((flags & (AC_USAC | AC_RSVD50 | AC_RSV603DA)) &&
(pAacDecoderChannelInfo[L]->pDynData->specificTo.usac.tns_on_lr ==
1)) ||
((flags & (AC_USAC | AC_RSVD50 | AC_RSV603DA)) == 0)) {
int max_sfb_ste = (INT)(pAacDecoderChannelInfo[L]->icsInfo.max_sfb_ste);
CJointStereo_ApplyMS(
pAacDecoderChannelInfo, pAacDecoderStaticChannelInfo,
pAacDecoderChannelInfo[L]->pSpectralCoefficient,
pAacDecoderChannelInfo[R]->pSpectralCoefficient,
pAacDecoderChannelInfo[L]->pDynData->aSfbScale,
pAacDecoderChannelInfo[R]->pDynData->aSfbScale,
pAacDecoderChannelInfo[L]->specScale,
pAacDecoderChannelInfo[R]->specScale,
GetScaleFactorBandOffsets(&pAacDecoderChannelInfo[L]->icsInfo,
pSamplingRateInfo),
GetWindowGroupLengthTable(&pAacDecoderChannelInfo[L]->icsInfo),
GetWindowGroups(&pAacDecoderChannelInfo[L]->icsInfo), max_sfb_ste,
maxSfBandsL, maxSfBandsR,
pAacDecoderChannelInfo[L]
->pComData->jointStereoData.store_dmx_re_prev,
&(pAacDecoderChannelInfo[L]
->pComData->jointStereoData.store_dmx_re_prev_e),
1);
} /* if ( ((elFlags & AC_EL_USAC_CP_POSSIBLE).... */
} /* if (pAacDecoderChannelInfo[L]->pDynData->RawDataInfo.CommonWindow)*/
/* apply intensity stereo */ /* modifies pAacDecoderChannelInfo[]->aSpecSfb
*/
if (!(flags & (AC_USAC | AC_RSVD50 | AC_RSV603DA))) {
if ((pAacDecoderChannelInfo[L]->pDynData->RawDataInfo.CommonWindow ==
1) &&
(el_channels == 2)) {
CJointStereo_ApplyIS(
pAacDecoderChannelInfo,
GetScaleFactorBandOffsets(&pAacDecoderChannelInfo[L]->icsInfo,
pSamplingRateInfo),
GetWindowGroupLengthTable(&pAacDecoderChannelInfo[L]->icsInfo),
GetWindowGroups(&pAacDecoderChannelInfo[L]->icsInfo),
GetScaleFactorBandsTransmitted(
&pAacDecoderChannelInfo[L]->icsInfo));
}
}
} /* maybe_stereo */
for (ch = 0; ch < el_channels; ch++) {
if (pAacDecoderChannelInfo[ch]->renderMode == AACDEC_RENDER_LPD) {
/* Decode LPD data */
CLpdChannelStream_Decode(pAacDecoderChannelInfo[ch],
pAacDecoderStaticChannelInfo[ch], flags);
} else {
UCHAR noSfbs =
GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo[ch]->icsInfo);
/* For USAC common window: max_sfb of both channels may differ
* (common_max_sfb == 0). */
if ((maybe_jstereo == 1) &&
(pAacDecoderChannelInfo[L]->pDynData->RawDataInfo.CommonWindow ==
1)) {
noSfbs = fMax(maxSfBandsL, maxSfBandsR);
}
int CP_active = 0;
if (elFlags & AC_EL_USAC_CP_POSSIBLE) {
CP_active = pAacDecoderChannelInfo[ch]
->pComData->jointStereoData.cplx_pred_flag;
}
/* Omit writing of pAacDecoderChannelInfo[ch]->specScale for complex
stereo prediction since scaling has already been carried out. */
int max_sfb_ste = (INT)(pAacDecoderChannelInfo[L]->icsInfo.max_sfb_ste);
if ((!CP_active) || (CP_active && (max_sfb_ste < noSfbs)) ||
((flags & (AC_USAC | AC_RSVD50 | AC_RSV603DA)) &&
(pAacDecoderChannelInfo[L]->pDynData->specificTo.usac.tns_on_lr ==
0))) {
CBlock_ScaleSpectralData(pAacDecoderChannelInfo[ch], noSfbs,
pSamplingRateInfo);
/*Active for the case of TNS applied before MS/CP*/
if ((flags & (AC_USAC | AC_RSVD50 | AC_RSV603DA)) &&
(pAacDecoderChannelInfo[L]->pDynData->specificTo.usac.tns_on_lr ==
0)) {
if (IsLongBlock(&pAacDecoderChannelInfo[ch]->icsInfo)) {
for (int i = 0; i < noSfbs; i++) {
pAacDecoderChannelInfo[ch]->pDynData->aSfbScale[i] =
pAacDecoderChannelInfo[ch]->specScale[0];
}
} else {
for (int i = 0; i < 8; i++) {
for (int j = 0; j < noSfbs; j++) {
pAacDecoderChannelInfo[ch]->pDynData->aSfbScale[i * 16 + j] =
pAacDecoderChannelInfo[ch]->specScale[i];
}
}
}
}
}
}
} /* End "for (ch = 0; ch < el_channels; ch++)" */
if (maybe_jstereo) {
/* apply ms */
if (pAacDecoderChannelInfo[L]->pDynData->RawDataInfo.CommonWindow) {
} /* CommonWindow */
else {
if (elFlags & AC_EL_USAC_CP_POSSIBLE) {
FDKmemclear(
pAacDecoderStaticChannelInfo[L]
->pCpeStaticData->jointStereoPersistentData.alpha_q_re_prev,
JointStereoMaximumGroups * JointStereoMaximumBands * sizeof(SHORT));
FDKmemclear(
pAacDecoderStaticChannelInfo[L]
->pCpeStaticData->jointStereoPersistentData.alpha_q_im_prev,
JointStereoMaximumGroups * JointStereoMaximumBands * sizeof(SHORT));
}
}
} /* if (maybe_jstereo) */
for (ch = 0; ch < el_channels; ch++) {
if (pAacDecoderChannelInfo[ch]->renderMode == AACDEC_RENDER_LPD) {
} else {
if (!(flags & (AC_USAC | AC_RSVD50 | AC_RSV603DA))) {
/* Use same seed for coupled channels (CPE) */
int pnsCh = (ch > 0) ? L : ch;
CPns_UpdateNoiseState(
&pAacDecoderChannelInfo[ch]->data.aac.PnsData,
pAacDecoderChannelInfo[pnsCh]->data.aac.PnsData.currentSeed,
pAacDecoderChannelInfo[ch]->pComData->pnsRandomSeed);
}
if ((!(flags & (AC_USAC))) ||
((flags & (AC_USAC)) &&
(pAacDecoderChannelInfo[L]->pDynData->specificTo.usac.tns_active ==
1)) ||
(maybe_jstereo == 0)) {
ApplyTools(
pAacDecoderChannelInfo, pSamplingRateInfo, flags, elFlags, ch,
pAacDecoderChannelInfo[L]->pDynData->RawDataInfo.CommonWindow);
}
} /* End "} else" */
} /* End "for (ch = 0; ch < el_channels; ch++)" */
if (maybe_jstereo) {
/* apply ms */
if (pAacDecoderChannelInfo[L]->pDynData->RawDataInfo.CommonWindow) {
/* if tns_on_lr == 0 run MS */
if ((flags & (AC_USAC | AC_RSVD50 | AC_RSV603DA)) &&
(pAacDecoderChannelInfo[L]->pDynData->specificTo.usac.tns_on_lr ==
0)) {
int max_sfb_ste = (INT)(pAacDecoderChannelInfo[L]->icsInfo.max_sfb_ste);
CJointStereo_ApplyMS(
pAacDecoderChannelInfo, pAacDecoderStaticChannelInfo,
pAacDecoderChannelInfo[L]->pSpectralCoefficient,
pAacDecoderChannelInfo[R]->pSpectralCoefficient,
pAacDecoderChannelInfo[L]->pDynData->aSfbScale,
pAacDecoderChannelInfo[R]->pDynData->aSfbScale,
pAacDecoderChannelInfo[L]->specScale,
pAacDecoderChannelInfo[R]->specScale,
GetScaleFactorBandOffsets(&pAacDecoderChannelInfo[L]->icsInfo,
pSamplingRateInfo),
GetWindowGroupLengthTable(&pAacDecoderChannelInfo[L]->icsInfo),
GetWindowGroups(&pAacDecoderChannelInfo[L]->icsInfo), max_sfb_ste,
maxSfBandsL, maxSfBandsR,
pAacDecoderChannelInfo[L]
->pComData->jointStereoData.store_dmx_re_prev,
&(pAacDecoderChannelInfo[L]
->pComData->jointStereoData.store_dmx_re_prev_e),
1);
}
} /* if (pAacDecoderChannelInfo[L]->pDynData->RawDataInfo.CommonWindow) */
} /* if (maybe_jstereo) */
for (ch = 0; ch < el_channels; ch++) {
if (elFlags & AC_EL_USAC_CP_POSSIBLE) {
pAacDecoderStaticChannelInfo[L]
->pCpeStaticData->jointStereoPersistentData.clearSpectralCoeffs = 0;
}
}
CRvlc_ElementCheck(pAacDecoderChannelInfo, pAacDecoderStaticChannelInfo,
flags, el_channels);
}
int CShortBlock_ReadSectionData(HANDLE_BIT_BUF bs,
CAacDecoderChannelInfo *pAacDecoderChannelInfo)
{
int top;
int band;
int group;
char sect_cb;
int sect_len;
int sect_len_incr;
int sect_esc_val = (1 << 3) - 1 ;
char *pCodeBook = pAacDecoderChannelInfo->pCodeBook;
int ErrorStatus = AAC_DEC_OK;
COUNT_sub_start("CShortBlock_ReadSectionData");
INDIRECT(1); PTR_INIT(1); MOVE(2); /* counting previous operation */
INDIRECT(1); PTR_INIT(1); FUNC(1); LOOP(1);
for (group=0; group<GetWindowGroups(&pAacDecoderChannelInfo->IcsInfo); group++)
{
PTR_INIT(1); /* pCodeBook[] */
FUNC(1); LOOP(1);
for (band=0; band<GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo->IcsInfo); )
{
MOVE(1);
sect_len = 0 ;
FUNC(2);
sect_cb = (char) GetBits(bs,4) ;
FUNC(2);
sect_len_incr = GetBits(bs,3);
LOOP(1);
while (sect_len_incr == sect_esc_val)
{
ADD(1);
sect_len += sect_esc_val;
FUNC(2);
sect_len_incr = GetBits(bs,3);
}
ADD(1);
sect_len += sect_len_incr;
ADD(1);
top = band + sect_len;
MULT(1); ADD(2); BRANCH(1);
if (top + group*MaximumScaleFactorBandsShort > (MAX_WINDOWS * MAX_SFB_SHORT)) {
COUNT_sub_end();
return (AAC_DEC_DECODE_FRAME_ERROR);
}
LOOP(1);
for (; band < top; band++)
{
MOVE(1);
pCodeBook[group*MaximumScaleFactorBandsShort+band] = sect_cb;
ADD(1); BRANCH(1);
if (pCodeBook[group*MaximumScaleFactorBandsShort+band] == BOOKSCL)
{
COUNT_sub_end();
return (AAC_DEC_INVALID_CODE_BOOK);
}
}
}
PTR_INIT(1); /* pCodeBook[] */
FUNC(1); LOOP(1);
for ( ; band < GetScaleFactorBandsTotal(&pAacDecoderChannelInfo->IcsInfo); band++)
{
MOVE(1);
pCodeBook[group*MaximumScaleFactorBandsShort+band] = ZERO_HCB;
}
}
COUNT_sub_end();
return (ErrorStatus);
}
int CShortBlock_ReadSpectralData(HANDLE_BIT_BUF bs,
CAacDecoderChannelInfo *pAacDecoderChannelInfo)
{
int i,index,step;
int window,group,groupwin,groupoffset,band;
int scfExp,scfMod;
int *QuantizedCoef;
char *pCodeBook = pAacDecoderChannelInfo->pCodeBook;
short *pScaleFactor = pAacDecoderChannelInfo->pScaleFactor;
float *pSpectralCoefficient = pAacDecoderChannelInfo->pSpectralCoefficient;
const short *BandOffsets = GetScaleFactorBandOffsets(&pAacDecoderChannelInfo->IcsInfo);
const CodeBookDescription *hcb;
COUNT_sub_start("CShortBlock_ReadSpectralData");
QuantizedCoef = (int*)pSpectralCoefficient;
PTR_INIT(5); INDIRECT(4); FUNC(1); /* counting previous operations */
LOOP(1);
for (window=0; window < MaximumWindows; window++)
{
PTR_INIT(1); /* pointer for QuantizedCoef[] */
LOOP(1);
for (index=0; index < MaximumBinsShort; index++) {
MOVE(1);
QuantizedCoef[window*MaximumBinsShort+index] = 0;
}
}
MOVE(1);
groupoffset = 0;
INDIRECT(1); FUNC(1); LOOP(1);
for (group=0; group < GetWindowGroups(&pAacDecoderChannelInfo->IcsInfo); group++)
{
PTR_INIT(1); /* pointer for pCodeBook[] */
INDIRECT(1); FUNC(1); LOOP(1);
for (band=0; band < GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo->IcsInfo); band++)
{
PTR_INIT(1);
hcb = &HuffmanCodeBooks[pCodeBook[group*MaximumScaleFactorBandsShort+band]];
INDIRECT(1); FUNC(1); LOOP(1);
for (groupwin=0; groupwin < GetWindowGroupLength(&pAacDecoderChannelInfo->IcsInfo,group); groupwin++)
{
ADD(1);
window = groupoffset + groupwin;
ADD(4); LOGIC(3); BRANCH(1);
if ( (pCodeBook[group*MaximumScaleFactorBandsShort+band] == ZERO_HCB)
||(pCodeBook[group*MaximumScaleFactorBandsShort+band] == INTENSITY_HCB)
||(pCodeBook[group*MaximumScaleFactorBandsShort+band] == INTENSITY_HCB2)
||(pCodeBook[group*MaximumScaleFactorBandsShort+band] == NOISE_HCB))
continue;
MOVE(1);
step = 0 ;
PTR_INIT(2); /* pointer for BandOffsets[],
QuantizedCoef[] */
LOOP(1);
for (index=BandOffsets[band]; index < BandOffsets[band+1]; index+=step)
{
INDIRECT(1); FUNC(2); PTR_INIT(1); FUNC(3);
step = CBlock_UnpackIndex(CBlock_DecodeHuffmanWord(bs,hcb->CodeBook),&QuantizedCoef[window*MaximumBinsShort+index],hcb);
INDIRECT(1); BRANCH(1);
if (hcb->Offset == 0)
{
PTR_INIT(1); /* pointer for QuantizedCoef[] */
LOOP(1);
for (i=0; i < step; i++)
{
BRANCH(1);
if (QuantizedCoef[window*MaximumBinsShort+index+i])
{
FUNC(2);
if (GetBits(bs,1)) /* sign bit */
{
MULT(1); STORE(1);
QuantizedCoef [window*MaximumBinsShort+index+i] = -QuantizedCoef [window*MaximumBinsShort+index+i];
}
}
}
}
ADD(1); BRANCH(1);
if (pCodeBook[group*MaximumScaleFactorBandsShort+band] == ESCBOOK)
{
FUNC(2); STORE(1);
QuantizedCoef[window*MaximumBinsShort+index] = CBlock_GetEscape(bs,QuantizedCoef[window*MaximumBinsShort+index]);
FUNC(2); STORE(1);
QuantizedCoef[window*MaximumBinsShort+index+1] = CBlock_GetEscape(bs,QuantizedCoef[window*MaximumBinsShort+index+1]);
FUNC(1); FUNC(1); ADD(2); LOGIC(1); BRANCH(1);
if (abs(QuantizedCoef[window*MaximumBinsShort+index]) > MAX_QUANTIZED_VALUE || abs(QuantizedCoef[window*MaximumBinsShort+index+1]) > MAX_QUANTIZED_VALUE) {
COUNT_sub_end();
return (AAC_DEC_DECODE_FRAME_ERROR);
}
}
}
}
}
INDIRECT(1); ADD(1);
groupoffset += GetWindowGroupLength(&pAacDecoderChannelInfo->IcsInfo,group);
}
INDIRECT(1); FUNC(1); LOOP(1);
for (window=0, group=0; group < GetWindowGroups(&pAacDecoderChannelInfo->IcsInfo); group++)
{
INDIRECT(1); FUNC(1); LOOP(1);
for (groupwin=0; groupwin < GetWindowGroupLength(&pAacDecoderChannelInfo->IcsInfo,group); groupwin++, window++)
{
MOVE(1);
index = 0;
PTR_INIT(2); /* pointer for BandOffsets[],
pScaleFactor */
INDIRECT(1); FUNC(1); LOOP(1) ;
/* quantize & apply scalefactors */
for (band=0; band < GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo->IcsInfo); band++)
{
/* scalefactor exponents and scalefactor mantissa for current band */
SHIFT(1);
scfExp = pScaleFactor[group*MaximumScaleFactorBandsShort+band] >> 2;
LOGIC(1);
scfMod = pScaleFactor[group*MaximumScaleFactorBandsShort+band] & 3;
PTR_INIT(2); /* pointer for QuantizedCoef[],
pSpectralCoefficient */
LOOP(1);
for (index=BandOffsets[band]; index < BandOffsets[band+1] ;index++)
{
ADD(1); FUNC(3); STORE(1);
pSpectralCoefficient[window*MaximumBinsShort+index] = CBlock_Quantize(QuantizedCoef[window*MaximumBinsShort+index],scfMod,scfExp-6);
}
}
PTR_INIT(1); /* pointer for pSpectralCoefficient */
LOOP(1);
for (; index < MaximumBinsShort; index++) {
MOVE(1);
pSpectralCoefficient[window*MaximumBinsShort+index] = 0.0;
}
}
}
COUNT_sub_end();
return (AAC_DEC_OK);
}
void CShortBlock_ReadScaleFactorData(HANDLE_BIT_BUF bs,
CAacDecoderChannelInfo *pAacDecoderChannelInfo,
unsigned char global_gain)
{
int temp;
int band;
int group;
int position = 0;
int factor = global_gain;
char *pCodeBook = pAacDecoderChannelInfo->pCodeBook;
short *pScaleFactor = pAacDecoderChannelInfo->pScaleFactor;
const CodeBookDescription *hcb = &HuffmanCodeBooks[BOOKSCL];
COUNT_sub_start("CShortBlock_ReadScaleFactorData");
INDIRECT(3); PTR_INIT(3); MOVE(2); /* counting previous operations */
INDIRECT(1); PTR_INIT(1); FUNC(1); LOOP(1);
for (group=0; group < GetWindowGroups(&pAacDecoderChannelInfo->IcsInfo); group++)
{
PTR_INIT(2); /* pCodeBook[]
pScaleFactor[]
*/
for (band=0; band < GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo->IcsInfo); band++)
{
BRANCH(2);
switch (pCodeBook[group*MaximumScaleFactorBandsShort+band])
{
case ZERO_HCB: /* zero book */
MOVE(1);
pScaleFactor[group*MaximumScaleFactorBandsShort+band] = 0;
break;
default: /* decode scale factor */
INDIRECT(1); FUNC(2);
temp = CBlock_DecodeHuffmanWord(bs,hcb->CodeBook);
ADD(2);
factor += temp - 60; /* MIDFAC 1.5 dB */
ADD(1); STORE(1);
pScaleFactor[group*MaximumScaleFactorBandsShort+band] = factor - 100;
break;
case INTENSITY_HCB: /* intensity steering */
case INTENSITY_HCB2:
INDIRECT(1); FUNC(2);
temp = CBlock_DecodeHuffmanWord(bs,hcb->CodeBook);
ADD(2);
position += temp - 60;
ADD(1); STORE(1);
pScaleFactor[group*MaximumScaleFactorBandsShort+band] = position - 100;
break;
case NOISE_HCB: /* PNS */
FUNC(5);
CPns_Read(pAacDecoderChannelInfo, bs, hcb, global_gain, band, group);
break;
}
}
}
COUNT_sub_end();
}